LRRPF52 Wrote:... We found QuickLoad to be off by 10,000-20,000psi in many instances, compared against multiple industry sources and our own calibrated pressure-test breech, so unless it has been updated and tuned to actual 6.5 Grendel reality, I wouldn't use it right now. The load data you have in the Grendel Handbooks is quite comprehensive. I used QuickLoad when I loaded .308 Winchester without any issues, but it has been way off with Grendel. ...This tidbit of info had been nagging on me quite a bit (about your experience with QL being off in a Grendel context). While researching various load workup methodologies (Ladder, OBT, OCW, etc.), I stumbled across this white-paper that speaks to tuning QL to be more accurate wrt observed chrony results. I've attached it herein in the interests of science and for archival/retrieval purposes.
And, for those who may be interested, the three methods I've found thus far are listed below and can be researched further at these links:
- Creighton Audette's Ladder Test
- Optimal Charge Weight (OCW) Method
- Optimal Barrel Time (OBT) Concept
Do the listed LDMs currently exist in this forum (i.e. a stickied post)? If not, does it make sense for the LDMs to be stickied for the benefit of easy access by all?
-MHz
si vis pacem para bellum